Means for utilizing secondary batteries on telephone-circuits



(No odem O. E. BUELL. v MEANS'I'OR UTILIZING SECONDARY BATTERIES 0N TELEPHONE CIRCUITS.

Patented Mat-1221,1882.

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UNITED STATES PATENT I OFFICE.

HARLES E. BUELL, OE NEw HAVEN, CONNECTICUT, AssIeNOE OE'TWO- THIRDS To' JAMEs e. SMITH, OF HAOKENSAOK, NEW JERSEY, AND GEORGE w. COY, OF MILFORD, CONNECTICUT.

MEANS FOR UTlLlZlNG SECONDARY BATTERIES N TELEPHONE-CIRCUITS.

SPECIFICATION forming part of Letters Patent No. 255,377, dated March 21, 1882,

Application filed December 3, 1881. (No model.)

To all whom it may concern Be it known that I, CHARLES E. BUELL, a citizen of the United States, residing at New Haven, in the county of New Haven and State of Connecticut, have invented certain new and useful Improvements in Means for Utilizing Secondary Batteries on Telephone-Circuits; and I do hereby declare the following to he a full, clear, and exact description of the inven- IO tion, such as will enable others skilled in the art to which it appertains to make and use the same, reference being bad to the accompanying drawing, and to the letters and figures of referencemarked thereon, which forms a part of this specification.

This invention relates to an improved complete telephone-station apparatus; and it consists, first, in thecombination, in atelephonestation apparatus, of a main line, including a call-bell and a secondary battery, a branch circuit, which includes a telephone, and switch devices for excluding said call-bell and secondary pile or battery from said main line and for completing said main-line circuit through the telephone-circuit; secondly, in the combination, in a telephone-station apparatus, of a main line,including a call-bell, a secondary pile or battery, and means for signaling to a remote or distant station; and, thirdly, in the 0 COIDDlDHtlOD lD a telephone-station apparatus,

of a main line, which includes a secondary battery, an independent branch circuit, which includes the secondary coil of a telephone-transmitter, induction apparatus, a normally-open 5 sub-circuit, which includes the secondary battery and the primary coil of the induction ap-' paratus,switch devices for excluding the secondary battery from the main line and for completing the main line through the branch cir- 0 cuit containing the secondary coil, and switch devices for closing the suocircuit prior to sending or receivinga message.

In the accompanying drawing, the figure illustrates a telephone station apparatus ar- 5 ranged in accordance with my invention.

The letter A indicates a secondary electrical pile or battery, which may be of any Wellknown or suitable construction, and having its opposite-poles connected with the main line,

as shown in full lines in the drawing, and also with the primary coilof the induction-coil or ind uctorium of the transmitter M by means of wires h h, (shown by dotted lines.)

A'metallic'spring, M, (shown in dotted lines as arranged within thetransmitter-case,) isin- 5 terposed in the primary circuit' of the induction-coil, and will, when left free, close said circuit by making contact with a metallic stop, m, connected with a wire leading from one of the Contact devices,which is controlled by the transmitter diaphragm; but when the telephone T is hung upon the hook m, which projects through the bottom of the casing from said spring-arm, the weight of the telephone will depressthe arm, and thus break the circuit.

The secondary coil of the transmitter connects with the main line on one side of the secondary pile A by means of a wire, 2, and it is connected with one terminal of the coil of the receiver T by a wire, 25', while a wire, it, leads from the other terminal of the receiver-coil to a contact-plate or switch-point, i.

The switch D is connected with the incoming line terminal, and may be placed in contact with either the plate or point i ora similar plate, t", and when in contact with the latter completes the main-line circuit through a call-bell, a b, and the secondary pile A, as shown. Thus it will be seen that when the main-line circuit is so completed, and the pri- 8o mary circuit of the transmitter is broken by the telephone holding M depressed, the main-line battery-current willhave no other path through the station than through the secondary pile A and the bell-magnet. This being its normal course, said current acts constantly, when the station-telephones are not in use at a particular station, to charge the secondary pile at the station. When, however, the telephone T is removed from its hook and the arm M rises, closing the primary circuit, and the switch D is swung into contact with point 'i, the charge of the secondary pile A flows from one pole to the other over the wires h h and primary circuit, and the main-line circuit is closed over 5 the station-telephone circuit, as before described. When the transmitter-diaphragm is now actuated by sound vibrations inthe usual manner in oral communication the variations caused thereby in the primary circuit produce the induced electrical waves, which traverse the line and act upon areceiver ata-connected station.

The secondary pile A will ordinarily, after being fully charged, work efliciently for about an hour.

A puslrbutton, K, or other contrivance, is provided for breaking the circuit for calling a remote station.

In another application filed by me June 6, 1881, I have substantially claimedl. A leleplnnte'StatiOu apparatus provided with a transmitter having; its secondary circuit arranged for connection with a main line, a secondary electric pile or battery arranged for connection with a main tine in a manner to become charged by an electric current flowing over said main line, and means for directing the current of said secondary electric pile or battery over i he primary circuit of the transmitter.

2. A line-wire provided at one end with a line-battery or electric-current generator, in combination with a secondary cell arranged upon said line and adapted to store up electricity upon the passage of the main-line current through it, a local circuit in circuit with said secondary cell, and a transmitter in said local circuit.

This matter so claimed in my other applicati m I therefore make no claim to here.

What I do claim herein, however, is-

1. The combination, in a telephone-station apparatus, of a main line, including a call-bell and a secondary battery, abranch circuit, which includes a telephone, and switch devices for excluding said call-bell and secondary pile or battery from said main line and completing" the main-line circuit through the telephone branch circuit, substantially as described.

2. The combination, in a telephone-station apparatus, of a mainiiue, including a call-bell, a secondary pile or battery, and means for sigualiug, to a remote or distant station, substantially as described.

3. The combination, in a telephone-station apparatus, of the following elements, viz: a main line, which includes a secondary battery, an independent branch circuit, which includes the secondary coil of an induction apparatus CHAS. E. BUELL.

Witnesses:

FRED F. GHUROH, MELVILLE CHURCH. 

